Fix Dockerfile to copy from public directory

Dockerfile

@@ -0,0 +1,3 @@
+FROM nginx:alpine
+COPY public/ /usr/share/nginx/html/
+EXPOSE 80

README.md

@@ -1,5 +1,20 @@
 # lvl0 Website
 
+## Production
+
+This is the docker-compose file needed to host this webiste:
+
+```
+services:
+  website:
+    image: codeberg.org/lvl0/website:latest
+    container_name: lvl0-website
+    ports:
+      - 5002:80
+    restart: unless-stopped
+networks: {}
+```
+
 ## Development
 
 Run zola:
@@ -7,3 +22,11 @@ Run zola:
 ```sh
 zola serve
 ```
+
+### Docker build
+
+To build a docker image after changes, use
+
+```sh
+sh .docker/build-docker.sh v0.1.0 
+```